M20 Hexagon Slotted Castle Nut BLACK A4 Stainless Steel (316) DIN 935

Hexagon Slotted Castle Nut A4 BLACK Stainless Steel (316) DIN 935

Castle nuts or castellated nuts are named for their resemblance to the parapets of a castle
A split cotter pin is inserted through opposite slots and a pre-drilled hole in a stud to prevent movement
Ideal where vibration may undo the fixing
Used where it is imperative that the nuts remains in place, such as wheel hubs
The castle nut has a wasted shoulder and sizes M12 and above are supplied in this pattern
Sizes M10 and below are known as slotted nuts and are cut from a complete hexagon